While making edits to campaign taxonomy using an existing or fresh campaign sheet, users should NOT remove any edits to default columns (like campaign name and advertiser).

Users should add/edit ONLY the category columns that they have created else the campaign sheet might not be processed correctly.

Any update to existing campaign categorization triggers an update that is completed in approximately 45 mins in all areas of the product except Campaign Optimizer where it gets completed by the next day. During this time, the filters might show old values.